Finding the Fourth Proportional to 1,139,166.74, 1,571,987.31 and 629,835.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,166.74 : 1,571,987.31 = 629,835.50 : x
2. Step 2: Convert to fraction form
   1,139,166.74/1,571,987.31 = 629,835.50/x
3. Step 3: Cross multiply
   1,139,166.74x = 1,571,987.31 × 629,835.50
4. Step 4: Simplify right side
   1,139,166.74x = 990,093,413,387.51
5. Step 5: Solve for x
   x = 990,093,413,387.51/1,139,166.74
6. Step 6: Final answer
   x = 869,138.27